"I've never met her, but I think she's sweet with what she does and I hope she gets on with it."

Meighan added that the group are "proud" to be headlining the event and promised to include a surprise in the show.

"We did it years ago back in 2004 and I just remember really enjoying it," he said. "It's a really good festival to be headlining, we're so proud to be doing it.

"We'll do something really special and captivating. One of our friends might pop out of the stage in a jack-in-the-box or something."

King of Leon, La Roux, Ellie Goulding, Pet Shop Boys, Madness, Mika, Kate Nash, Sugababes and Pixie Lott will also perform at the event, which takes place at Hylands Park in Chelmsford and Weston Park, Staffordshire over the weekend of August 21 and 22.